Sewing-machine shuttle



(No Model.)

J. V. I) ELDREDGE.

Sewing Machine Shuttle. No. 232,248. Patented Sept. 14,1880.

UNITED STATES PATENT OFFICE.

JOHN V. D. ELDREDGE, OF DETROIT, MICHIGAN.

SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 232,248, dated. September 14, 1880.

Application filed March 12, 1880.

To allwhom it may concern:

Be it known that 1, JOHN V. D. ELDREDGE, of Detroit, in thecounty of \Vayne and State of Michigan, have invented an Improvement on Shuttles for Sewing-Machines, of which the following is a specification.

My invention relates to certain new and useful improvements in the construction of shuttles for sewing-machines, whereby tension can be had upon the thread being used from the bob bin and the danger of the thread catching upon the shuttle is avoided, as hereinafter more full y set forth, and pointed out in the claims.

In the drawings, Figure l is a perspective view with the tension-spring closed. Fig. 2 is an enlarged perspective with tension-sprin g opened. Fig. 3 is alongitudinal section on the line 00 .r, Fig. 1.

In the accompanying drawings, which form a part of this specification, Arepresents a shuttlecasc, which carries a bobbin, B, all of the usual construction, except as hereinafter described.

G is a spring-plate pivoted, by means of the screw a, to the heel of the shuttle upon the side which lies uppermost when placed in the shuttle-race. The free end of this spring 0 is bent inwardly, forming a lip, b, which, when the spring is in its closed position, rests within the wall of the shuttle, which is cut away, as at c, for that purpose, the spring being retained in its proper position by means of the post (I, which projects outwardly from the wall of the shuttle and enters a hole, 0, in the spring, as is clearly shown in the drawings. Beneath the spring C, I cut away the wall of the shuttle case, forming an irregular elongated slot or opening, h, which is partially closed by the spring, and in the edge of the shuttle is formed the usual slot i.

In practice, the bobbin wound with thread is placed within the shuttle in the ordinary manner. The thread is then passed through the SlOti in the shuttle-wall, thence to and under the lip b of the spring, and is drawn upon until it comes in contact with the post d, the thread lying between the spring 0 and the wall of the shuttle. Asthe shuttle moves forward (No model.)

in the race to make the stitch the thread is drawn back beneath the spring and around the post (I. The side of the shuttle being cut away, as shown, presents no surface upon which the thread can possibly catch, the thread lying over and along the opening it in the shuttle-case after it has passed the post (7, until it reaches the edge of the spring 0, and thereby having no surface in the case to catch upon between the post and the edge of the spring, while the formation of the lower edge of the spring prevents its catching at that point.

As greater or less tension is desired, the screw to is turned so as to cause the spring to press to a greater or less degree upon the thread, and this tension may be regulated without re moving the shuttle from the machine, while it can readily be seen that the shuttle can be and is threaded without opening or disturbing the tension-spring, which latter is only touched for the purpose of regulating the tension.

.The side of the shuttle presents no surface upon which the thread can rest to prevent its being carried back under the spring as it passes through the loop at h.

\Vhat I claim as my invention is 1. The tension s nipg-plate C, pivot-ally secured to the shuttle'case, as set forth, in combination with the shuttle-case provided with an elongated opening, 71 cut in the wall thereof, said opening lying under the path of the bobbin-thread as it passes from between the tension-plate and the shuttleease, and thence under the outer edge of the tension-plate, substantially as described, and for the purpose set forth.

2. A shuttle-case for sewing-machines provided with an elongated opening, it, in (,Olllbl' nation with the post (I, projecting outwardly from the wall of the case, and the tension springdate O, pivotally secured to the heel of the case and partially closing said opening, substantially as described, and for the purpose set forth.

JOHN V. D. ELDREDGE.

Witnesses H. S. SPRAGUE, A. BARTHEL. 

